Novel Pathway for Catabolism of the Organic Sulfur Compound 3,3′-Dithiodipropionic Acid via 3-Mercaptopropionic Acid and 3-Sulfinopropionic Acid to Propionyl-Coenzyme A by the Aerobic Bacterium Tetrathiobacter mimigardefordensis Strain DPN7
Novel Pathway for Catabolism of the Organic Sulfur Compound 3,3′-Dithiodipropionic Acid via 3-Mercaptopropionic Acid and 3-Sulfinopropionic Acid to Propionyl-Coenzyme A by the Aerobic Bacterium Tetrathiobacter mimigardefordensis Strain DPN7
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好氧细菌 Tetrathiobacter mimigardefordensis 菌株 DPN7 将有机硫化合物 3,3-二硫代二丙酸通过 3-巯基丙酸和 3-亚磺基丙酸分解代谢为丙酰辅酶 A 的新途径
DOI:
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发表时间:
2008
影响因子:
4.4
通讯作者:
A. Steinbüchel
中科院分区:
文献类型:
--
作者:
J. H. Wübbeler;Nadine Bruland;Kornelia Kretschmer;A. Steinbüchel
ABSTRACT The hitherto unstudied microbial degradation of the organic disulfide 3,3′-dithiodipropionic acid (DTDP) was investigated with the recently described bacterium Tetrathiobacter mimigardefordensis strain DPN7T (DSM 17166T; LMG 22922T), which is able to use DTDP as the sole carbon source for growth. 3-Mercaptopropionic acid (3MP) and 3-sulfinopropionic acid (3SP) were detected in the growth medium and occurred as intermediates during DTDP degradation. To identify genes coding for enzymes of DTDP catabolism, Tn5::mob-induced mutants of T. mimigardefordensis were generated. Screening of transposon mutant libraries yielded many mutants fully or partially impaired in utilizing DTDP as a carbon source. Mapping of the insertion loci in some mutants identified four disrupted open reading frames (ORFs) with putative metabolic functions. The ORFs were assigned function on the basis of homologies with lpdA (EC 1.8.1.4), cdo (EC 1.13.11.20), sucCD (EC 6.2.1.5), and acnB (EC 4.2.1.3). Tn5::mob insertions occurred additionally in the vicinity of heat shock protein-encoding genes. The predicted function of the LpdA homologue in T. mimigardefordensis is cleavage of the disulfide bond of DTDP to form two molecules of 3MP. Cdo catalyzes the conversion of the sulfhydryl group of 3MP, yielding the corresponding sulfinic acid, 3SP. SucCD exhibits thiokinase activity, ligating coenzyme A (CoA) with 3SP to form 3SP-CoA. Afterwards, an elimination of sulfite via a putative desulfinase is expected. acnB encodes a putative 2-methylisocitrate dehydratase. Therefore, a new pathway is proposed for the catabolism of DTDP via 3MP, 3SP, and 3SP-CoA toward propionyl-CoA, which is then further catabolized via the 2-methylcitric acid cycle in T. mimigardefordensis.
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DOI:
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发表时间:
2002
期刊:
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影响因子:
--
作者:
SG Chai;Jacob J. Banik;M. Maroney
通讯作者:
SG Chai;Jacob J. Banik;M. Maroney
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Ziemienowicz,A;Skowyra,D;Zeilstra-Ryalls,J;Fayet,O;Georgopoulos,C;Zylicz,M
通讯作者:
Zylicz,M
DOI:
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发表时间:
1985
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Cuebas,D;Beckmann,JD;Frerman,FE;Schulz,H
通讯作者:
Schulz,H
DOI:
--
发表时间:
1985
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Foote,J;Lauritzen,AM;Lipscomb,WN
通讯作者:
Lipscomb,WN
DOI:
10.1385/0-89603-258-2:187
发表时间:
1994
期刊:
Methods in molecular biology (Clifton, N.J.)
影响因子:
--
作者:
Hartl,DL;Ochman,H
通讯作者:
Ochman,H